Description

Styrene/Methylstyrene Copolymer is a synthetic polymer formed from the copolymerization of styrene and methylstyrene monomers. This engineered material offers a valuable balance of properties, including enhanced thermal stability and processability compared to standard polystyrene. It is primarily utilized in industrial applications where specific performance characteristics are required. Key sectors that rely on this copolymer include the adhesives, coatings, and specialty plastics industries.

Application

• Adhesive Formulations: Acts as a key tackifier and film-forming agent in pressure-sensitive and hot-melt adhesives.
• Industrial Coatings: Used in solvent-based coatings to improve hardness, gloss, and chemical resistance.
• Plastic Modifiers: Employed as a compatibilizer or impact modifier in polymer blends and composites.
• Sealants and Caulks: Provides durability and flexibility in construction and automotive sealant applications.
• Printing Inks: Serves as a resin component to enhance adhesion and rub resistance in various ink systems.
• Rubber Compounding: Used as a processing aid and reinforcing agent in certain rubber formulations.

Basic Information

Product Name	Styrene/Methylstyrene Copolymer
CAS No.	37218-15-8
Molecular Formula	(C8H8.C9H10)x
Molecular Weight	Varies (Polymer)
Synonyms	Styrene-α-methylstyrene copolymer; Poly(styrene-co-α-methylstyrene); α-Methylstyrene-styrene copolymer; Styrene/α-methylstyrene resin; SMA copolymer (in specific contexts); AMS-styrene copolymer; Vinyltoluene-styrene copolymer (related); P(S-co-AMS)
EINECS	Contact for details

Quality Control

Our Styrene/Methylstyrene Copolymer is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistency in molecular weight distribution, composition, and key physical properties. Certificates of Analysis (COA) documenting these parameters are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from heat sources and open flame. For long-term storage, consider an inert atmosphere to prevent potential oxidation.

Specification

Item	Specification
Appearance	White to off-white beads or powder
Identification (IR)	Complies
Composition (Styrene Content)	40 - 60%
Molecular Weight (Mw)	10,000 - 50,000 g/mol
Glass Transition Temperature (Tg)	90 - 120 °C
Volatile Matter	≤ 1.0 %

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.